The file is over a KB limit
Set the exact maximum from the receiving portal and verify the finished bytes instead of guessing with a quality slider.
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Free online image tools: compress, resize, convert, and remove metadata in your browser
Compress image to a maximum KBChoose a maximum KB Prepare an application photoPrepare an application photo Resize image to exact pixelsResize to exact pixels Download your own YouTube videoFind official download options Crop image to exact sizeCrop to exact size Put images into an ordered PDFCreate an ordered PDF Remove tested image metadataRemove tested metadata
Start with the requirement
What needs to change?
The dimensions or shape are wrong
Resize when the proportions already match. Crop when the required aspect ratio differs and some outer content can be removed.
Prepare an application photoResize exact pixelsCrop exact sizeCompare resize and crop
The destination rejects the format
Check its accepted-format list first, then create a JPG, PNG, or WebP copy without pretending conversion restores lost detail.
You need a safer sharing copy or PDF
Inspect metadata before sharing, make a tested scrubbed copy when needed, or arrange source images into a predictable PDF.
Use the tools with context
Understand what each change does
How image KB limits actually work
Understand decimal KB, why “under” is safer than “exact,” and what compression changes.
Read guideResize or crop? Choose without stretching the image
Use aspect ratio to decide whether you need new dimensions, a crop, or both.
Read guideJPG, PNG, or WebP: which format should you use?
Choose a format based on transparency, detail, file size, and destination support.
Read guide